Fonction testAdd BRUGIER

public void testAdd() {

        Rational r1 = new Rational(9,3);
        Rational r2 = new Rational(10,4);
        Rational r3 = new Rational(8,4);

        r1.add(r2);

        assertEquals("11/2",r1.toString());

        r1.add(r3);

        assertEquals("15/2",r1.toString());
    }